Lighting fixture



FIG. 1 is a perspective view of an ornamental design for a lighting fixture showing our new design;

FIG. 2 is a front elevational view thereof;

FIG. 3 is a back elevational view thereof;

FIG. 4 is a right side elevational view thereof;

FIG. 5 is a left side view thereof;

FIG. 6 is a top plan view thereof; and,

FIG. 7 is a bottom plan view thereof.

The broken lines showing a light bulb socket, an attachment member, and a top portion are for illustrative purposes only and form no part of the claimed design and show environmental structure only. 

The ornamental design for a lighting fixture, as shown and described. 